Yes, I agree that breast NETs (as well as gynecological NETs) are rare. While I have had surgeries for three NETs they have been much more typical and located in the digestive tract.
I would certainly encourage you to consult with a NET specialist. Unfortunately, NET specialists are not located in every state. However, even if you have to travel for an initial consult it would probably be very helpful for you. Mayo has some great specialists. Here is a list from the Carcinoid Foundation website for others across the country and also world-wide. https://www.carcinoid.org/for-patients/treatment/find-a-doctor/
Will you post again and let me know how you are doing in treating this type of NET?